Using path.join in config to enable webpack --watch under Windows

Author: Richard Williams

1-basic-react/webpack.config.js

@@ -1,8 +1,9 @@
 var debug = process.env.NODE_ENV !== "production";
 var webpack = require('webpack');
+var path = require('path');
 
 module.exports = {
-  context: __dirname + "/src",
+  context: path.join(__dirname, "/src"),
   devtool: debug ? "inline-sourcemap" : null,
   entry: "./js/client.js",
   module: {